from django.db import models
from django.contrib.auth.models import AbstractUser
from django.conf import settings
from itsdangerous import TimedJSONWebSignatureSerializer as TJWSSerializer, BadData

# Create your models here.
from meiduo_mall.utils.models import BaseModel
from users import constants


class User(AbstractUser):
    """用户模型类"""
    mobile = models.CharField(max_length=11, unique=True, verbose_name='手机号')
    # 增加一个校验的字段而邮箱字段本来就有
    email_active = models.BooleanField(default=False, verbose_name='邮箱验证状态')

    # 为User模型类添加默认地址
    default_address = models.ForeignKey('Address', related_name='users', null=True, blank=True,
                                        on_delete=models.SET_NULL, verbose_name='默认地址')

    class Meta:
        db_table = 'tb_users'
        verbose_name = '用户'
        verbose_name_plural = verbose_name

    def generate_verify_email_url(self):
        """
        生成验证邮箱的url
        :return:
        """
        serializer = TJWSSerializer(settings.SECRET_KEY, expires_in=constants.VERIFY_EMAIL_TOKEN_EXPIRES)
        data = {'user_id': self.id, 'email': self.email}
        token = serializer.dumps(data).decode()
        verify_url = 'http://www.meiduo.site:8080/success_verify_email.html?token=' + token
        return verify_url

    @staticmethod
    def check_verify_email_token(token):
        serializer = TJWSSerializer(settings.SECRET_KEY, expires_in=constants.VERIFY_EMAIL_TOKEN_EXPIRES)
        try:
            data = serializer.loads(token)
        except BadData:
            return None
        else:

            user_id = data['user_id']
            email = data['email']
            try:
                user = User.objects.get(id=user_id, email=email)
            except User.DoesNotExist:
                return None
            else:
                return user


# 用户地址数据库模型类
class Address(BaseModel):
    """
    用户地址
    """
    user = models.ForeignKey(User, on_delete=models.CASCADE,
                             related_name='addresses', verbose_name='用户')
    title = models.CharField(max_length=20, verbose_name='地址名称')
    receiver = models.CharField(max_length=20, verbose_name='收货人')

    province = models.ForeignKey('areas.Area', on_delete=models.PROTECT,
                                 related_name='province_addresses', verbose_name='省')
    city = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='city_addresses', verbose_name='市', null=True)

    district = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='district_addresses',
                                 verbose_name='区')
    place = models.CharField(max_length=50, verbose_name='地址')

    mobile = models.CharField(max_length=11, verbose_name='手机')

    tel = models.CharField(max_length=20, null=True, blank=True, default='',
                           verbose_name='固定电话')

    email = models.CharField(max_length=30, null=True, blank=True, default='',
                             verbose_name='电子邮箱')

    is_deleted = models.BooleanField(default=False, verbose_name='逻辑删除')

    # ########
    class Meta:
        db_table = 'tb_address'
        verbose_name = '用户地址'
        verbose_name_plural = verbose_name
        # 进行Address查询时，默认使用的排序方式
        ordering = ['-update_time']